.clearfix:after { /*伪元素是行内元素 正常浏览器清除浮动方法*/
  content: "";
  display: block;
  height: 0;
  clear: both;
  visibility: hidden;
}

body {
  margin: 0;
  padding: 0;
  background-color: #fff;
}

a{
	text-decoration: none;
}

h1{
	margin: 0;
	padding: 0;
}

p{
	margin: 0;
	padding: 0;
}

